Freelance Software Engineer & Web Developer London, United Kingdom
From Canary Wharf trading floors to Shoreditch scale-ups and Mayfair luxury houses, London businesses operate at global velocity. Mr Umer Malik delivers direct senior-level software architecture, native iOS/Android mobile apps, high-ROAS paid advertising, and conversion-engineered web platforms without central London agency markups.
London: Fintech, Enterprise & Growth
Six high-demand engineering and commercial solutions for London businesses.
FCA-compliant account aggregation, Strong Customer Authentication (SCA), and low-latency payment rails with automated reconciliation.
React Native and native Swift/Kotlin iOS and Android apps with biometric authentication, secure offline storage, and instantaneous push notifications.
Precision-targeted paid search and B2B LinkedIn campaigns reaching City directors, corporate partners, and venture-backed founders with high ROAS.
Mayfair-grade digital aesthetics, custom typography, micro-interactions, and 60fps WebGL visual systems engineered to elevate brand prestige.
Fine-tuned LLM assistants and automated Python triage bots trained on proprietary company data to eliminate repetitive back-office tasks.
Containerized Docker microservices hosted in AWS London (eu-west-2), built for sub-50ms latency and high-volume European user spikes.
Software Engineering Services Available in London
Delivering high-performance digital systems for Shoreditch startups, Canary Wharf financial firms, Soho creative agencies, and Mayfair retail brands.
Custom Web & Portal Development
High-throughput, scalable web platforms built for the market in London. Custom CMS, REST APIs, sub-200ms TTFB, full security.
Shopify & E-Commerce Engineering
Headless storefronts and bespoke Shopify architectures built for lightning speeds and conversion in London.
iOS & Android Mobile App Dev
Native mobile applications for users in London. Offline-first architecture, biometric auth, and real-time syncing.
AI Chatbots & Workflow Automation
GPT-4 powered intelligent agents fine-tuned on company data for 24/7 customer service and sales automation.
Technical SEO & Web Speed Optimization
Core Web Vitals tuning and structured schema architecture pushing businesses in London to Page 1.
Plugin-Free WordPress Engineering
Bespoke, bloat-free WordPress architectures. Custom Gutenberg blocks, REST API endpoints, and Redis caching.
Web Security & Penetration Testing
WAF configuration, SSL hardening, penetration testing, and full compliance with OWASP Top 10 standards.
Payment Gateway Engineering
PCI-DSS compliant checkouts with 3D Secure and multi-currency support for businesses in London.
API Development & Backend Systems
High-throughput RESTful and GraphQL APIs with complete OpenAPI documentation and OAuth2 security.
AWS Cloud Infrastructure & DevOps
AWS cloud architectures, Docker containerization, and automated CI/CD deployment pipelines with zero downtime.
UI/UX Design & 3D WebGL Interfaces
Pixel-perfect translation from Figma to clean code with 3D WebGL animations for leading brands in United Kingdom.
Workflow Automation & Custom Scripting
Custom automation scripts and AI pipelines eliminating repetitive manual tasks for companies in London.
Database Architecture & Tuning
Database design, SQL query tuning, and Redis caching layers engineered to handle massive concurrent traffic.
Legacy System Modernization
Audit and re-architect legacy codebases into modern microservices with zero downtime and zero data loss.
Conversion Rate Optimization (CRO)
Data-driven UX audits and landing pages turning digital traffic in London into measurable, profitable revenue.
White-Label Software Engineering
Clean-code engineering under NDA with 100% transfer of source code, repository, and intellectual property.
The London Engineering Standard
Commercial rigor and technical sovereignty built into every project.
Engagements structured strictly as independent B2B consultancy under English Law with clear deliverable milestones.
Transparent milestone pricing with zero London agency day-rate markups or hidden account management fees.
Complete source code, database rights, and private GitHub repository ownership transferred on milestone completion.
Lightweight architectures optimized for tube commuter mobile connections on patchy 4G/5G networks.
Rigorous data privacy frameworks, cookie-less telemetry options, and auditable user consent logs.
Direct engineer-to-founder communication throughout UK core hours (9:00–18:00 GMT/BST) with zero middleman lag.
London Software Engineering FAQ
Questions organisations in London, England ask before starting a project.
What core services do you provide for London enterprises?▼
I provide end-to-end custom software development, native iOS/Android mobile apps, high-converting Shopify Plus stores, paid advertising (Google & LinkedIn Ads), luxury UI/UX design, and AI automation engines.
How does your outside-IR35 contracting work under English Law?▼
Contracts are structured on a clear deliverable-milestone basis with fixed quotes in GBP (£), substitution rights, and genuine B2B consultancy terms that fully satisfy HMRC and IR35 regulations.
Can you manage both our web platform development and paid ad campaigns?▼
Yes. Developing the software and running paid Google/LinkedIn campaigns concurrently ensures conversion tracking, landing page speed, and messaging are tightly synchronized for maximum ROAS.
What is your typical sprint cycle and milestone timeline?▼
Projects are split into 1-to-2 week sprints with continuous daily commits pushed to your private Git repository and weekly live video/staging demonstrations.
How are source code and intellectual property transferred?▼
Upon milestone settlement, 100% intellectual property rights, unencumbered source code, production credentials, and repositories are formally assigned to your business under NDA.
Do you provide post-launch maintenance and continuous SLA support?▼
Yes. Flexible monthly maintenance retainers cover 24/7 uptime monitoring, security patching, dependency updates, and feature enhancements starting from £280/mo.
Great dreams deserve craftsmanship, not compromises. Let’s build yours.
© 2026 UMER XPERT. SERVING THE UNITED KINGDOM — LONDON TO EDINBURGH. All rights reserved. Contracts compliant with English Law & outside IR35.